Abstract

Telephones are often used to facilitate criminal and terrorist acts. The signaling core of public telephone networks generates valuable data about phone calls and calling patterns, which may be used in criminal investigations. However, much of this data is not maintained by service providers and is, therefore, unavailable to law enforcement agencies. This paper presents techniques for collecting and storing important data pertaining to phone calls and calling patterns. The techniques leverage existing telecommunications network resources, and address the long-term storage issues of massive amounts of call record data.